android调用系统拍照、从系统相册中选择照片并剪裁

2019-04-15 19:18发布

站内文章 / PIC单片机
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拍照  //拍照 private void takephoto(){ //定一个拍照图片的路径 photopath = Environment.getExternalStorageDirectory().getAbsolutePath()+"/lmp/pic/" + LmpUntil.gettime() + ".png"; if (Build.VERSION.SDK_INT >= 24 ) { //兼容android7.0 使用共享文件的形式 ContentValues contentValues = new ContentValues(1); contentValues.put(MediaStore.Images.Media.DATA, photopath); //定一个Uri output = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues); }else{ output = Uri.fromFile(new File(photopath)); } Intent openCameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); openCameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, output); startActivityForResult(openCameraIntent, TAKE_PHOTO); } 从系统相册中选择 //调用系统图片选择 Intent intent = new Intent(Intent.ACTION_GET_CONTENT); intent.setType("image/*"); startActivityForResult(intent, 33 ); onActivityResult中的操作 @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == TAKE_PHOTO && resultCode == RESULT_OK) { //注释部分是直接获取拍照后的bitmap // Bitmap bitmap = null; // if (data != null) { // if (data.hasExtra("data")) { // Log.i("URI", "data is not null"); // bitmap = data.getParcelableExtra("data"); // headphoto.setImageBitmap(bitmap);//imageView即为当前页面需要展示照片的控件，可替换 // } // } else { // Log.i("URI", "Data is null"); // if (Build.VERSION.SDK_INT >= 24){ // // try { // bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(output)); // } catch (FileNotFoundException e) { // e.printStackTrace(); // } // headphoto.setImageBitmap(bitmap); // }else { // bitmap = BitmapFactory.decodeFile(photopath); // headphoto.setImageBitmap(bitmap); // } // } //剪切 Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(output, "image/*"); intent.putExtra("scale", true); intent.putExtra(MediaStore.EXTRA_OUTPUT, output); startActivityForResult(intent, CROP_PHOTO); // 启动裁剪程序 }else if (requestCode == CROP_PHOTO&& resultCode == RESULT_OK) { //裁剪完成将bitmap保存至目标位置 try { Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver() .openInputStream(output)); headphoto.setImageBitmap(bitmap); File fileorg = new File(photopath); if(fileorg.exists()){ fileorg.delete(); } photocrappath = Environment.getExternalStorageDirectory().getAbsolutePath()+"/lmp/pic/headcrap.png"; File file = new File(photocrappath); FileOutputStream out = null; out = new FileOutputStream(file); if (bitmap != null) { bitmap.compress(Bitmap.CompressFormat.PNG, 100, out); } else { throw new FileNotFoundException(); } out.flush(); out.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }else if ( requestCode == 33 ){ //系统图片选择之后的回调 if (data != null) { Uri uri = data.getData(); try { Bitmap mBitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri)); // Bitmap mBitmap = MediaStore.Images.Media.getBitmap(cr, uri);//显得到bitmap图片 headphoto.setImageBitmap(mBitmap); } catch (Exception e) { e.printStackTrace(); } } } } 剪裁后可以根据uri获取文件路径 拿到路径后可以做个压缩处理下面提供根据uri获取文件路径的方法  // 从Uri中获取文件路径 public static String getpathfromuri( Uri uri ,Context context){ final String scheme = uri.getScheme(); String lujing = null; if ( scheme == null ) lujing = uri.getPath(); else if ( ContentResolver.SCHEME_FILE.equals( scheme ) ) { lujing = uri.getPath(); } else if ( ContentResolver.SCHEME_CONTENT.equals( scheme ) ) { Cursor cursor = context.getContentResolver().query( uri, new String[] { MediaStore.Images.ImageColumns.DATA }, null, null, null ); if ( null != cursor ) { if ( cursor.moveToFirst() ) { int index = cursor.getColumnIndex( MediaStore.Images.ImageColumns.DATA ); if ( index > -1 ) { lujing = cursor.getString( index ); } } cursor.close(); } } return lujing; }